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Filename : liquid.meter.js
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(function($){'use strict';var defaultOptions={min:0,max:100,shape:'circle',color:'#82BF41',background:'#4C4C52',stroke:'#23282F',textColor:'#FFFFFF',fontFamily:'Open Sans',fontSize:'24px',fontWeight:'600',liquidOpacity:0.9,liquidPalette:['#82BF41'],speed:3000,animate:true};var LiquidMeter=function(el,options){if(typeof Snap=='undefined'){throw 'Snap.js not found.';}
this.meter=$(el);this.options=options;this.options.text=this.meter.text();this.init();};LiquidMeter.prototype={init:function(el,options){this.wrapper=this.meter.parent('.liquid-meter');if(!this.wrapper.get(0)){var wrapper=$('<div>').attr({'class':'liquid-meter'});this.wrapper=this.meter.wrap(wrapper).parent();}
var svg=document.createElementNS('http://www.w3.org/2000/svg','svg');svg.setAttribute('preserveAspectRatio','xMidYMid meet');svg.setAttribute('viewBox','0 0 220 220');this.wrapper.prepend(svg);this.svg=$(svg).attr({width:'100%',height:'100%'});this.frames=[[6,-6,-10,6,13,-10],[6,-5,-13,4,31,-5],[7,-5,-9,0,31,-5],[7,-5,-9,-6,30,-6],[6,-10,-10,-10,33,-4],[8,-4,-8,-13,38,7],[8,-8,-5,-15,55,11],[7,-19,-2,-16,33,16],[3,-23,-2,-16,42,21],[3,-22,7,-18,27,21],[2,-26,15,-18,25,20],[-3,-23,18,-18,26,19],[-6,-40,18,-18,22,22],[-15,-16,23,-13,37,22],[-15,-16,23,-13,37,22],[-17,-16,23,-10,33,22],[-18,-16,23,-10,35,21],[-20,-12,23,-5,34,20],[-22,-13,20,-1,35,22],[-22,-13,20,5,32,21],[-21,-16,19,8,34,15],[-23,-16,16,10,36,9],[-22,-23,13,10,48,0],[-23,-20,13,8,45,-6],[-20,-22,7,10,44,-6],[-20,-22,5,10,42,-7],[-18,-20,0,10,41,-8],[-15,-22,-7,10,41,-8],[-11,-33,-8,10,41,-8],[-7,-36,-6,10,15,-11],[0,-39,-8,10,15,-11],[0,-36,-8,7,15,-11],];this.paper=Snap(svg);this.draw();this.observe();if(this.options.animate){this.animate();}else{this.drawFrame(1);}
this.wrapper.addClass('liquid-meter-loaded');return this;},draw:function(){this.min=parseInt(this.meter.attr('min'),10);this.max=parseInt(this.meter.attr('max'),10);this.value=parseInt(this.meter.val()||this.meter.attr('value'),10);var paper=this.paper;this.recipient=paper.circle(110,110,95);var background=this.makeGradient(this.options.background);this.recipient.attr({fill:background,stroke:this.options.stroke,strokeWidth:15});var mask=paper.circle(110,110,87);mask.attr({fill:'#FFFFFF'});this.liquid=paper.path();this.liquid.attr({id:'front',fill:this.options.color,mask:mask,stroke:lighten(this.options.color,20),strokeWidth:1});this.label=paper.text('50%','50%',[this.value,'%']);this.label.attr({fill:this.options.textColor,dy:'.4em','font-family':this.options.fontFamily,'font-size':this.options.fontSize,'font-weight':this.options.fontWeight,'text-anchor':'middle',stroke:this.options.textColor});this.label.selectAll('tspan:nth-child(2)').attr({'font-size':'24',stroke:'none'});return this;},observe:function(){var _self=this;this.meter.on('change',function(){_self.set($(this).val());});},set:function(val){var value=parseInt(val,10);this.meter.val(value);this.value=value;this.label.node.textContent=value+'%';},liquidPalette:function(val){this.options.liquidPalette=val;},background:function(val){this.options.background=val;},stroke:function(val){this.options.stroke=val;},color:function(val){this.options.color=val;this.liquid.attr({fill:this.options.color,stroke:lighten(this.options.color,20)});},makeGradient:function(color){return this.paper.gradient(Snap.format('L(0, 0, 100, 100){color.top}-{color.bottom}',{color:{top:lighten(color,6),bottom:color}}));},makePath:function(value,t1,x1,y1,t2,x2,y2){var top=((100-((value*100)/this.max))*1.76)+22;return Snap.format('M0,{left} C{curve.x1},{curve.y1} {curve.x2},{curve.y2} 220,{right} L220,220 L0,220 z',{left:top-(t1||0),right:top-(t2||0),curve:{x1:x1+top,y1:y1+top,x2:x2+top,y2:y2+top}});},drawFrame:function(number){var frame=this.frames[number-1],t1=frame[0],x1=frame[1],y1=frame[2],t2=frame[3],x2=frame[4],y2=frame[5];this.liquid.attr({d:this.makePath(this.value,t1,x1,y1,t2,x2,y2)});},animate:function(){var requestAnimationFrame=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(callback){setTimeout(callback,0);},frames=this.frames.length,interval=this.options.speed/frames,currentFrame=1,drawFrame=this.drawFrame.bind(this);function loop(){requestAnimationFrame(function(){draw();});setTimeout(loop,interval);}
function draw(){drawFrame(currentFrame);currentFrame++;if(currentFrame>=frames){currentFrame=1;}}
loop();return this;}};$.fn.liquidMeter=function(options,value){var isSetter=(typeof options==='string'&&!!value);if(!isSetter){options=$.extend({},defaultOptions,options);}
return this.map(function(){var instance=$(this).data('liquid-meter');if(!instance){instance=new LiquidMeter(this,options);$(this).data('liquid-meter',instance);}
if(isSetter){instance[options](value);}
return instance;});};function lighten(color,percent){var n=parseInt(color.slice(1),16),a=Math.round(2.55*percent||0),r=(n>>16)+a,b=(n>>8&0x00FF)+a,g=(n&0x0000FF)+a;return '#'+(0x1000000+(r<255?r<1?0:r:255)*0x10000+
(b<255?b<1?0:b:255)*0x100+(g<255?g<1?0:g:255)).toString(16).slice(1).toUpperCase();};}(jQuery));